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Corrosion Testing for Metal Finishing provides metal finishers with a range of test methods as well as guidance in the choice of method for a particular finish. There is a wide range of corrosion test methods available, the majority being the subject of Standard Specifications or being brought to Standards status. With many product Standards there is a choice of test methods available to met the Standard requirements. It is hoped that the relevant choice may be obtained more easily as a result of the information published in this book. The book outlines the apparatus and procedure for each test method and discusses its applicability to different metals and finishes. Indications are given of the nature and extent of the corrosion which develops in the test. Reference is also made to the relevant Standards for each test method. The book begins with a discussion of the basic requirements for corrosion testing of finished metal products. Subsequent chapters are devoted to testing procedures such as humidity tests, salt fog tests, industrial atmosphere test, porosity test, and anti-perspiration tests.
As an instructor in various finishing courses, I have frequently made the statement over the years that "In the field of metal finishing there is very little black and white, just a great deal of grey. It is the purpose of the instructor to familiarize the student with the beacons that will guide him through this fog. " To a very considerable extent, a handbook such as this serves a similar purpose. It is also subject to similar limitations. Providing all the required information would result in a multi-volume encyclopedia rather than a usable handbook. In the pages that follow, you will therefore find frequent references to other sources where more detailed explanations or information can be found. The present goal is proper guidance and the provision ofthe most frequently required facts, not everything that is available. In the 13 years since the last edition, changes in the finishing industry have been profound but in one sense have resulted in simplifying matters rather than complicating them. Because technology has advanced to a level of complexity rendering "home brew" impracti cal in many cases, dependence on proprietary compounds has become common. Therefore, detailed solution compositions are often no longer significant or even practical. It is thus more important to provide instruction about the factors that affect the choice of the most suitable type of proprietary material.